This is a great question and something that several of our customers have tackled directly themselves with a small middleware microservice. Here’s a quick diagram to demonstrate how this could be achieved:

You could ofcourse introduce an admin interface on top of this to act as a control layer/mechanism if need be or potentially look at using flows (custom data) in the Moltin dashboard to tag/store information on individual products to control their status on Amazon (the middleware could then react appropriately based on these custom fields you set).